To focus our efforts onto a manageable number of packages, this package is
currently not maintained. Security fixes and submitted bug fixes will
still be released, but no new features should be expected. This bundle
might have outdated documentation, there is no support from the CMF team
and you should not expect bugs to be fixed.

If you want to help co-maintaining this package, tell us in a GitHub issue
or in #symfony_cmf of the Symfony devs slack.